(TXT) View Source
       
       # 3COM CORPORATION
       
          PHONE LINK 300
       
          Card Type                Modem (asynchronous)                  
          Chip Set                 U.S. Robotics                         
          Maximum Data Rate        300bps                                
          Data Bus                 External                              
          Data Modulation Protocol WE 103/113                            
       
                                                                   54167
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function        | Label  |   Function    |   Label   |
          |------------------------------------------------------------|
          | Line out                  |   CN1    | DC power     | CN4  |
          |---------------------------+----------+--------------+------|
          | Line in                   |   CN2    | Power switch | SW1  |
          |---------------------------+----------+--------------+------|
          | RS-232/422                |   CN3    |              |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                 Setting                 | Label | Position |
          |-----------------------------------------+-------+----------|
          | Originate enabled                       | SW2/A |   Off    |
          |-----------------------------------------+-------+----------|
          | Answer enabled                          | SW2/A |    On    |
          |-----------------------------------------+-------+----------|
          | Local echo disabled                     | SW2/B |   Off    |
          |-----------------------------------------+-------+----------|
          | Local echo enabled                      | SW2/B |    On    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Color | Status |             Condition              |
          |------+-------+--------+------------------------------------|
          |  ON  |  Red  |   On   |            Power is on             |
          |------+-------+--------+------------------------------------|
          |  ON  |  Red  |  Off   |            Power is off            |
          |------+-------+--------+------------------------------------|
          |  CD  |  Red  |   On   |      Carrier signal detected       |
          |------+-------+--------+------------------------------------|
          |  CD  |  Red  |  Off   |    Carrier signal not detected     |
          |------+-------+--------+------------------------------------|
          |  TS  |  Red  |   On   |         Test mode enabled          |
          |------+-------+--------+------------------------------------|
          |  TS  |  Red  |  Off   |         Test mode disabled         |
          |------+-------+--------+------------------------------------|
          |  SD  |  Red  |   On   |     Modem is transmitting data     |
          |------+-------+--------+------------------------------------|
          |  SD  |  Red  |  Off   |   Modem is not transmitting data   |
          |------+-------+--------+------------------------------------|
          |  RD  |  Red  |   On   |      Modem is receiving data       |
          |------+-------+--------+------------------------------------|
          |  RD  |  Red  |  Off   |    Modem is not receiving data     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTES                |
          |------------------------------------------------------------|
          |      Note: Transmit level adjustment, this can be made by  |
          |      looking under the Phone Link for a screw              |
          |      potentiometer. Turning the screw clockwise will       |
          |      increase transmit level and turning the screw         |
          |      counterclockwise will decrease transmit level. This   |
          |      should be done if you are experiencing errors         |
          |      receiving data or the remote receiving data from the  |
          |      Phone Link.                                           |
          |                                                            |
          |      Diagram not available.                                |